Update debian.md (#16654)

* Update debian.md

Set correct filemask for `/etc/apt/keyrings` . If this is not 0755, the keys in the directory cannot be used.

Co-authored-by: Sebastiaan van Stijn <thaJeztah@users.noreply.github.com>
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ArnoSen 2023-02-07 15:18:25 +01:00 committed by GitHub
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@ -96,7 +96,7 @@ Docker from the repository.
2. Add Docker's official GPG key:
```console
$ sudo mkdir -p /etc/apt/keyrings
$ sudo mkdir -m 0755 -p /etc/apt/keyrings
$ curl -fsSL {{ download-url-base }}/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
```